Axillary bud is constituted by

Options

A. Lateral meristem, because axillary buds are located laterally
B. Entire shoot apical meristem
C. Some cells left behind from shoot apical meristem
D. Secondary meristem

Answer

### Step-by-Step Solution:

1. **Understanding the Axillary Bud**:
- The axillary bud is a structure found in plants, located in the angle between the stem and a leaf (the axil).

2. **Constituents of the Axillary Bud**:
- The axillary bud is primarily made up of **apical meristem**.

3. **Role of Apical Meristem**:
- The apical meristem is responsible for the growth of new tissues. It is a region of actively dividing cells that contributes to the elongation of the plant.

4. **Formation of Leaves**:
- As the apical meristem grows, it differentiates to form leaves. This process is crucial for the plant's development and overall growth.

5. **Meristematic Tissues**:
- The apical meristem also leaves behind **meristematic tissues** or cells at the nodes, which are the points where leaves attach to the stem. These tissues can continue to divide and contribute to further growth.

6. **Conclusion**:
- Therefore, the axillary bud is constituted by the apical meristem and the associated meristematic tissues.

### Final Answer:
The axillary bud is constituted by the **apical meristem**.

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